Abstract:

Precision jamming technology is one of the hot research directions in current new electronic warfare.To solve the problem of accurately adjusting the spatial and frequency domain distribution characteristics of jamming power,a precision jamming waveform design method based on the alternating multiplier method is proposed.First,a mathematical model for the optimization problem of designing constant-modulus precision jamming waveforms under the joint optimization objective of spatial and frequency domain characteristics is presented.Furthermore,by introducing variables,the non-convex quartic term contained in the original objective function is transformed into a quadratic term,enabling the optimization problem to be solved by the alternating direction method of multipliers.Based on theoretical derivation,the optimal closed form solution for each iteration of the alternating direction method of multipliers is obtained,thereby reducing the computational complexity of the algorithm.Simulation experiments show that compared to existing precision jamming waveform design methods that only optimize the spatial jamming power distribution,the precision jamming waveform designed by this algorithm has better power spectrum distribution characteristics in the synthesized signal within the preset jamming area,which is more in line with the requirements of actual jamming tasks;meanwhile,compared to existing joint optimization algorithms in the spatial and frequency domains,the algorithm proposed in this paper considers the waveform constant-modulus constraint,which is more in line with the needs of engineering implementation.Moreover,the proposed algorithm is lower in computational complexity and it can further reduce the computational time through parallel computing.

Key words: precision jamming, jamming waveform design, joint optimization, alternating direction method of multipliers, waveform constant-modulus constraint